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[18F]FLT-PET in a patient with locally advanced rectal cancer. Anterior and posterior projection images demonstrate intense [18F]FLT uptake in bone that reflects the proliferation of cells the in bone marrow. There is increased accumulation of [18F]FLT in the rectal cancer (arrowhead in right panel). In addition, there is increased accumulation of [18F]FLT in the urinary bladder (arrow in the left panel), which is a normal finding.
